Other than that I get mine from the local Costco. Membership is £30 per year. However 16 blades are £21.23. Based on using just one blade a week, Tesco is £103.87 and Costco would be £98 including membership. You can also get low cost food and drinks in bulk. I'm a diet coke addict and save nearly £300 per year shopping at Costco

best to wait for the supermarkets to come up with a special to be honest, i am a trader and go to a few cash and carry's and even for my myself its not worth buying blades from there as they are just as dear if not more then a supermarket